Jetson Nano Production Module - SD Card Interface Software Reset Problem

[WayneWWW]

Hi,

Please also refer to this thread and also add vmmc-always-on in dts.

Jetson Nano SD card enters back to high speed mode instead of uhs mode after soft reboot

Hi, Opening a new issue as this is on different lines, brought here from: Slow SD card access speed (read+write) with Jetson Nano production module - #39 by jetson_user. As discussed in the above topic, there was an issue with a slow access to SD card. The issue was solved by the patch mentioned there. However, a strange behaviour was noticed: When I do a soft reboot (sudo reboot), and then check the ios using: cat /sys/kernel/debug/mmc1/ios, I get the following output: clock: 50000000 Hz …

Also, we have two questions for you

1. Your log does not show the reboot error but just the normal dmesg. We need that error log.

2. In your dmesg, there is CRC error from mmc1, do you always have this case in every boot?